/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**/

package yashandb

import (
	"context"
	"fmt"

	"git.zabbix.com/ap/plugin-support/zbxerr"
)

func cdbHandler(ctx context.Context, conn YasClient, params map[string]string, _ ...string) (interface{}, error) {
	var CDBInfo string

	row, err := conn.QueryRow(ctx, getCDBQuery(params["Database"]))
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

	err = row.Scan(&CDBInfo)
	if err != nil {
		return nil, zbxerr.ErrorCannotFetchData.Wrap(err)
	}

	if CDBInfo == "" {
		CDBInfo = "[]"
	}

	return CDBInfo, nil
}

func getCDBQuery(name string) string {
	var whereStr string
	if name != "" {
		whereStr = fmt.Sprintf(`WHERE NAME = '%s'`, name)
		fmt.Println(whereStr)
	}

	return fmt.Sprintf(`
SELECT 
'[{"yashandb":{'||LISTAGG('"'||NAME||'":'||VALUE,',')||'}}]'
from
(
SELECT
	'open_mode'  NAME,
	DECODE(OPEN_MODE, 'MOUNTED', 1, 'READ ONLY', 2, 'READ WRITE', 3, 'READ ONLY WITH APPLY', 4, 'MIGRATE', 5, 0) AS value
FROM
	V$DATABASE
UNION ALL 
 SELECT
	'role' NAME,
	DECODE(DATABASE_ROLE, 'SNAPSHOT STANDBY', 1, 'LOGICAL STANDBY', 2, 'PHYSICAL STANDBY', 3, 'PRIMARY', 4, 'FAR SYNC', 5, 0) AS value
FROM
	V$DATABASE
UNION ALL 
 SELECT
	'force_logging' NAME,
	DECODE(LOG_MODE, 'ARCHIVELOG', 1, 'NOARCHIVELOG' , 0, 0) AS value
FROM
	V$DATABASE
UNION ALL 
 SELECT
	'log_mode' NAME,
	DECODE(LOG_MODE, 'NOARCHIVELOG', 0, 'ARCHIVELOG', 1, 'MANUAL', 2, 0) AS value
FROM
	V$DATABASE
)
`)
}
